I bought a spray cleaner called Monster ScreenClean at Best Buy when I bought an LCD TV. It came with a Microfiber Cloth.
I use it on my Laptop Screen.
It says it is a cleaning kit for Home and Office Electronics.
Put the spray cleaner on the cloth then wipe the screen.
So try a shop that sells TV's.

We use the lens cloths that come premoistened in a foil pack from where the optical department is at Wal-Mart. Sometimes they are in electronics and right now above the candy at the check out counters. They say to never spray liquid on the screen so if you use spray ~ spray the cloth and then wipe.

Loralye-I just use a lint free cloth-dampen one end with plain water-wipe the screen and dry it with the other end. Works like a charm for me-no extra cost & streak free. I am really obsessive keeping screens spot free-PC, Kindle Fire, touch screen fone-hate fingerprints on shiney surfaces. Now if I was as particular about sweeping & mopping, lol.

I use the cloth that I have for my glasses. It was a gift from my optometrist. Came free with a $367.00 pr of glasses.;)

Be careful what you use, not all computer screens can be cleaned the same way. My screen is glassy, so I use the optical cleaner solution that I get FREE at Costco, which is where I buy my glasses. They have a tank of cleaner for you to refill your own bottle! ...and I use the cleaners cloth that came with my first purchase of the cleaner.

wow thanks ladies, it would appear the commonality here is the soft cloth that you may (or may not) get with your pair of eye glasses. I have this too & I did not know about anything else but I am thankful for the information. My next question is: the pc should probably turned off?